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Is x a difftime object?
is.difftime(x)
an R object
TRUE if x is a difftime object, FALSE otherwise.
is.instant, is.timespan, is.interval, is.period.
is.instant
is.timespan
is.interval
is.period
# NOT RUN { is.difftime(as.Date("2009-08-03")) # FALSE is.difftime(make_difftime(days = 12.4)) # TRUE # }
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